An animal shelter spends $2.35 per day to care for each cat and $5.50 per day to care for each dog. pat noticed that the shelter spent $89.50 caring for cats and dogs on wednesday.
write an equation to represent the possible numbers of cats and dogs that could have been at the shelter on wednesday.

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.